DNS Explained for Business Owners
What DNS is, why it matters for performance and security, and what changes when you use a managed resolver.
DNS — the Domain Name System — is often called the phonebook of the internet. It translates human-friendly names like ubifi.in into numerical IP addresses that computers use to connect. Every website visit, email and app connection depends on it.
How a lookup works
When you type a website address, your device asks a DNS resolver for the address. If the resolver does not already know the answer, it queries other DNS servers across the internet, then returns the result to your device. This usually takes milliseconds.
Who provides your DNS?
By default, devices use the resolver provided by your internet connection or router. Some businesses use free public resolvers, and others use managed DNS services with security features.
Why DNS affects performance
Slow DNS adds delay to every new connection. Fast, reliable resolvers make browsing and cloud apps feel snappier.
Why DNS affects reliability
If DNS fails, the internet seems to stop working even though the connection is up — nothing can be found by name. Resilient resolvers with multiple servers prevent this.
Why DNS affects security
Attackers use DNS to direct users to phishing sites and to control malware. Protective DNS services block these malicious lookups.
Your own domain's DNS
Separately, your business domain has authoritative DNS records for your website and email. Protect your domain registrar account with strong passwords and multi-factor authentication to prevent hijacking.
Managed resolvers add value
A managed resolver can provide filtering, reporting, policy control and support — features free resolvers do not offer.
Simple to change
Switching resolvers is usually a router or DHCP setting change.
The bottom line
DNS is invisible but fundamental. Choosing a fast, secure, managed resolver improves performance, reliability and security for your whole business.
Learn more about Cloud DNS & Web Filtering from UbiFi, or talk to our team.
Protective DNS that blocks phishing, malware and unwanted content for every device on your network — no software to install.
